5551 results about "Blow molding" patented technology

A mold system for blow molding hollow plastic containers includes an extruder for providing a hollow tube of plastic material having a longitudinal axis. Three mold segments include at least two mold segments that are movable against the third mold segment, in directions perpendicular to the tube axis, between a closed position in which the mold segments form a hollow mold cavity in which the tube is captured and an open position spaced from the tube axis. A blow pin is disposed on one of the mold segments to pierce the tube in the closed position of the mold segments. One of the mold segments may be a mold core movably mounted on a second of the mold segments, and cylinders are mounted on the second mold segment for moving the mold core between an extended position and a retracted position with respect to the second mold segment. The blow pin may be movably mounted on the mold core.

Main chain thermotropic liquid crystal esters, ester-imides, and ester-amides were prepared from AA, BB, and AB type monomeric materials and were end-capped with phenylacetylene, phenylmaleimide, or nadimide reactive end-groups. The resulting reactive end-capped liquid crystal oligomers exhibit a variety of improved and preferred physical properties. The end-capped liquid crystal oligomers are thermotropic and have, preferably, molecular weights in the range of approximately 1000-15,000 grams per mole. The end-capped liquid crystal oligomers have broad liquid crystalline melting ranges and exhibit high melt stability and very low melt viscosities at accessible temperatures. The end-capped liquid crystal oligomers are stable for up to an hour in the melt phase. These properties make the end-capped liquid crystal oligomers highly processable by a variety of melt process shape forming and blending techniques including film extrusion, fiber spinning, reactive injection molding (RIM), resin transfer molding (RTM), resin film injection (RFI), powder molding, pultrusion, injection molding, blow molding, plasma spraying and thermo-forming. Once processed and shaped, the end-capped liquid crystal oligomers were heated to further polymerize and form liquid crystalline thermosets (LCT). The fully cured products are rubbers above their glass transition temperatures. The resulting thermosets display many properties that are superior to their non-end-capped high molecular weight analogs.

A table includes a table top with an upper surface and a lower surface. The table top is preferably constructed from blow-molded plastic and it includes a generally hollow interior. The table top includes a downwardly extending lip one or more strengthening members that are integrally formed in the lip. The lip is desirably integrally formed in the table top as part of a unitary structure and the lip includes a generally hollow interior that is integrally formed during the blow-molding process with the generally hollow interior of the table top. Advantageously, the table top may include a plurality of depressions that are integrally formed in the table top and the strengthening members may be generally aligned with at least some of the depressions. The strengthening members include one or more of inwardly extending portions, outwardly extending portions and / or ribs that increase a thickness of the lip. The strengthening members may also be formed in a corner of the table top.

The present invention relates to a light emitting medium which includes a container and a liquid core. In accordance with an important aspect of the invention, the liquid core includes an aqueous solution or mixture of a water-soluble polymer. The refractive indices of the liquid core and that of the container may be different. However, the aqueous solution or mixture may have a lower or higher refractive index than that of the container. The mixture may be completely transparent or translucent and have a color other than clear. The container may be of any material that is translucent or transparent and be of any color.The raw materials for the light emitting medium in accordance with the present invention are less costly than known light guides and offer numerous advantages when compared to other illumination light guides. Water advantageously is a major raw material of the present invention. The water-soluble polymer component may be used in relatively minute amounts. For example, a liquid core in accordance with the present invention can be formed from up to 99.9% water and 0.01% water-soluble polymers, although higher amounts of water-soluble polymer may result in better characteristics. The container material may be formed from typically available polymers, such as polyvinyl chloride, acrylics and methacrylics or polyolefins and be formed by commonly known processes, such as extrusion, blow-molding and injection molding.In one embodiment of the invention, the light emitting medium in accordance with the present invention is combined with at least one light emitting diode (LED), a power source and a switching device to form a self contained illumination device. In another embodiment of the invention, images are formed on the container in different colors. Multiple LEDs of various wavelengths are selectively illuminated to simulate motion of the images.

A molding composition of at least 50% by weight of a polyamine-polyamide copolymer obtained from 0.05 to 2.5% by weight of a polyamine having at least 4 nitrogen atoms and having a viscosity of at least 5 000 Pa.s at 250° C. and at a shear rate of 0.1 l / s, and having a viscosity ratio of at least 7 at 250° C., when the melt viscosities at shear rates of 0.1 l / s and 100 l / s are compared with one another, has high melt stiffness and is easy to cut, and performs well in blow molding.

Bimodal polyethylene compositions and blow molded bottles made therefrom are provided. In at least one specific embodiment, the composition includes at least one high molecular weight polyethylene component having a molecular weight distribution (MWD) of about 6 to about 9, a short chain branch content of less than about 2 branches per 1,000 main chain carbons, and a Mz of about 1,100,000 or more. The composition also includes at least one low molecular weight polyethylene component where a ratio of weight average molecular weight of the high molecular weight polyethylene component to weight average molecular weight of the low molecular weight polyethylene component is about 20 or less. The polyethylene composition has a density of about 0.94 g / cc or more, an ESCR of about 600 hours or more, a percent die swell of about 70% or more, and may comprise at least 70% ethylene-derived units.